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This makes sapphires very durable and scratch-resistant
and it has been used throughout history for various purposes
Iron gives them blue
Rhodochrosite is a bubblegum pink to rose red stone
although the colors are much more muted
Black Spinel 3mm Natural Round - 15-16 Inch HPS02252022 This makes sapphires very durableSpinel is a hard vitreous magnesium aluminum oxide, and comes in a range of other colors, but those varieties are transparent. Black Spinel not only has the dark color, but it is opaque as well, rendering its black especially deep and mysterious. Sometimes called the "Black Prince's Ruby" for its role in the English crown. It has been mistaken for ruby and sapphire at times, but can be distinguished by its structure and its lower relative hardness.
